CN202494746U - Early warning device for monitoring whether busbar contact is fine - Google Patents

Abstract

The utility model discloses an early warning device for a photovoltaic busbar chamber, and the early warning device can real time monitor whether the contact of busbar contact points is fine. In the photovoltaic busbar chamber industry, due to the fact that the bad contact of copper bar contact points inside the chamber is not timely processed, accidents that lead to disasters happen occasionally. The principle of the early warning device provided by the utility model is that a temperature sensor is arranged on the attachment of each busbar contact point. The temperature sensor real-time monitors the temperature of busbar contact points. If the temperature of contact points is abnormal, a timely alarm is given to notify the maintenance personnel to process the fault, thus the accident influence is prevented from expansion. With the early warning device with low cost, the staff is informed of the fault position, and the fault is processed timely and efficiently.

Description

A kind of whether good prior-warning device of bus-bar contact of monitoring

Skill wood field

The utility model belongs to the field of photovoltaic power generation in the new forms of energy, is the prior-warning device of realizing that monitoring bus-bar contact in real time is whether good.Confluxing here is meant multichannel photovoltaic group string or assembly parallel connection.

Background technology

Single photovoltaic module generated energy generally has only several hectowatts, and voltage has only tens volts.Photovoltaic plant is that parallel connection improves electric current then by the series connection raising voltage of many photovoltaic modulies.The parallel connection here is referred to as photovoltaic here and confluxes.The box that confluxes, header box or direct current cabinet that photovoltaic confluxes and generally is arranged in photovoltaic plant are indispensable parts in the photovoltaic plant.

In photovoltaic confluxes, the reason of a lot of fault generating contact that to be bus-bars among Fig. 1 (among Fig. 1 13) is connected with Fuse box (among Fig. 1 10) or connection terminal (among Fig. 1 12) position loose contact, the contact resistance change is greatly; Electric current through the time, contact (among Fig. 1 12) heating produces very high temperature; This can't carry out artificial judgment unusually basically, and during unmanned for a long time the processing, temperature continues to raise; Burn header box, cause major accident.Because connecting point position is hidden; Be difficult to distinguish whether contact well by naked eyes; The existing goods producer of confluxing does not have good way to this; Can only require the operator in strict accordance with technological process production through the various means of productions, but can not avoid poor contact phenomenon, this accident still happens occasionally.

Summary of the invention

For solving, the present invention proposes and a kind ofly rely on real-time monitoring bus-bar temperature to judge whether to occur the prior-warning device of loose contact owing to the serious consequence that causes can not be in time handled in loose contact.

The utility model solves the technical scheme that its technical matters adopted: the utility model is made up of one or more temperature sensors and the controller that is attached thereto; Temperature sensor is installed in bus-bar and fuse, terminal box or connection terminal tie point next door (shown in accompanying drawing 2); Controller is monitored the temperature of corresponding contact in real time through each temperature sensor; Whether controller is unusual according to each contact temperature that records, and judges whether the contact of loose contact, sends warning message as required; The site administrator can find position of failure point rapidly according to warning message, fixes a breakdown.In order further to improve the accuracy of judgement degree, can be at the local mounting temperature sensor far away slightly apart from contact, as the whether unusual reference of contact next door temperature.The utility model can be realized separately, also can be integrated in other equipment that close on, in the current monitoring equipment that confluxes.Certainly, this device not only can be used to monitor the bus-bar contact, and other that can be used for also that photovoltaic confluxes need be monitored the contact of contact situation.

The beneficial effect of the utility model is: the present invention reports to the police to abort situation through increasing near one or more temperature sensors that are installed in the bus-bar early, and the indication fault position, can improve reliability greatly to fault.

Description of drawings

This instructions has two accompanying drawing: Fig. 1, the contact synoptic diagram of traditional header box bus-bar, and wherein 10 is Fuse box, 11 screws, 12 contacts, 13 is bus-bar; Fig. 2, the contact synoptic diagram of the header box bus-bar of increase monitoring contact fault, wherein 20 is Fuse box, and 21 is screw, and 22 is contact, and 23 is bus-bar, 24 is temperature sensor.

Embodiment

Fig. 2 is the contact synoptic diagram that increases the header box bus-bar of monitoring contact fault, and temperature sensor (among Fig. 2 24) is installed on (or on bus-bar) near the contact (among Fig. 2 22) of bus-bar (among Fig. 2 23), and temperature sensor connects controller, in real time monitor temperature.When the contact loose contact, contact temperature raises, and temperature conduction is to temperature sensor; Controller obtains the temperature of corresponding contact; Whether be abnormal temperature, if abnormal temperature then sends warning message and informs that main control room has branch road unusual through software algorithm if drawing; Notify the maintainer to carry out fault handling, fault was solved before major break down takes place.

Claims (3)

1. monitor the whether good prior-warning device of bus-bar contact for one kind; Be used for whether monitoring bus-bar contact contacts good device in the photovoltaic header box; It is characterized in that at the photovoltaic contact installed beside temperature sensor that confluxes; Whether the corresponding contact temperature of monitoring judges unusually according to this temperature whether corresponding contact contacts unusually in real time.

2. the prior-warning device whether monitoring bus-bar as claimed in claim 1 contact is good, whether unusual it is characterized in that can be at the local mounting temperature sensor far away slightly apart from contact, as the reference of contact next door temperature.

3. the prior-warning device whether monitoring bus-bar as claimed in claim 1 contact is good is characterized in that and can realize separately, also can be integrated in other equipment that close on, as the part of other equipment.

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